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32 Cards in this Set
- Front
- Back
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What ligaments provide anterior-posterior stability at the knee? |
ACL & PCL |
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What ligament provides medial stability at the knee? |
MCL |
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What ligament provides lateral stability at the knee? |
LCL |
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The ligaments attaching to the menisci to the tibial plateaus are the : |
coronary ligaments |
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The ligament attaching the menisci to each other |
transverse ligament |
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Which meniscus has fibers attaching it firmly to the joint capsule and to the medial collateral ligament? |
medial |
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Because it is more tightly adhered to the ligament and capsule, which meniscus is more susceptible to tearing from a lateral force to the knee? |
medial meniscus |
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Because the medial condyle and plateau are larger, there is more excursion there so the tibia ends up rotating ______ in extension |
externally |
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When the foot is on the ground, the knee locks into extension in the final degrees of motion via femur rotation in what direction? |
internally |
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To be able to have that motion at the knee what must the hip be able to do in standing? |
Extension |
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The patella develops within the quad tendon. It articulates with the _______ groove of the femur |
Intercondylar |
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The intercondylar groove of the femur is embedded in the anterior joint capsule of the knee and is attached to the tbia via: |
Ligamentum patellae |
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At rest does the patella sit in the intercondylar groove? |
NO |
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With Extension, the patella glides which way in the groove? |
Superiorly in the groove |
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With Flexion, the patella glides which way in the groove? |
Inferiorly in the groove |
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Can hypomobility of the patella in the groove limit knee motion? |
Yes, interferes with range of knee flexion and extensor lag w/ extension |
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How do you measure the Q angle? |
-ASIS to patella -Tibia tubercle to patella |
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The patellar tendon should be called the patellar ligament because |
it attaches bone to bone |
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Increased Q angle can cause increased pressure of the patella against the lateral facet when the knee: |
flexes during WB |
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Structural reasons for increased Q Angle include: |
-Wide Pelvis -Femoral Anteversion -Coxa Varum -Genu Valgum -Laterally displaced tibial tuberosity |
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LE motions in transverse plane that may increase Q angle are: |
-IR Femur rotation -External tibial rotation -Pronated subtalur joint |
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Dynamic knee valgus where the knee joint center moves _______ relative to the foot during WB activities also increases the Q angle |
Medially |
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Tight ITB and lateral retinaculum prevent: |
Medial gliding of the patella |
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Tight ankle plantarflexors result in: |
pronation of the foot when the ankle dorsiflexes, causing medial torsion of the tibia and functional lateral displacement of the tibial tuberosity in relationship to patella. |
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Weakness of the hip abductors and external rotators may result in |
Adduction of the femur and valgus at the knee and contributes to increased IR of the femur under loaded WB in subjects with patellofemoral pain syndrome. |
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When the knee is in complete extension 0 degrees, the patella is |
superior to the trochlear groove |
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At how many degrees of knee flexion does the inferior facet articulate with the superior trochlear groove? |
15 |
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Contact increases up to _____ degrees and beyond that is controversy |
60 |
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What range of motion has the greatest patellofemoral compression forces? |
30-60 degrees |
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At initial contact in gait, the _______________ control the amount of knee flexion and also cause knee extension as progressing to _______. |
quariceps midstance
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What are the primary knee flexors? |
hamstrings |
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In CKC, weightbearing those muscles also function to _______ the knee by _________ on the tibia. |
Extend pulling |
